RssArticle.kt: Modify functions into assigning style

Signed-off-by: 1552980358 <1552980358@qq.com>

app/src/main/java/io/legado/app/data/entities/RssArticle.kt

@@ -19,32 +19,23 @@ data class RssArticle(
     var image: String? = null,
     var read: Boolean = false
 ) {
-
+    
-    override fun hashCode(): Int {
+    override fun hashCode() = link.hashCode()
-        return link.hashCode()
+    
-    }
-
     override fun equals(other: Any?): Boolean {
-        if (other == null) {
+        other ?: return false
-            return false
+        return if (other is RssArticle) origin == other.origin && link == other.link else false
-        }
-        if (other is RssArticle) {
-            return origin == other.origin && link == other.link
-        }
-        return false
-    }
-
-    fun toStar(): RssStar {
-        return RssStar(
-            origin = origin,
-            sort = sort,
-            title = title,
-            starTime = System.currentTimeMillis(),
-            link = link,
-            pubDate = pubDate,
-            description = description,
-            content = content,
-            image = image
-        )
     }
+    
+    fun toStar() = RssStar(
+        origin = origin,
+        sort = sort,
+        title = title,
+        starTime = System.currentTimeMillis(),
+        link = link,
+        pubDate = pubDate,
+        description = description,
+        content = content,
+        image = image
+    )
 }